NativeSender relies on obsolete WebRequest.Create

[MKuenzi]

Hi, I noticed when looking through the code that NativeSender.cs relies on WebRequest.Create to make it's Http requests.

Microsoft recommends you switch this to use HttpClient:
https://learn.microsoft.com/en-us/dotnet/api/system.net.webrequest.create?view=net-7.0#system-net-webrequest-create(system-string)

It would be nice to have an overload in your API where I can provide my own instance of HttpClient, as that class is intended to only be initialized once:

https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpclient?view=net-7.0#instancing

I'm evaluating Smarty right now for use in our application. If possible I would like to know if you are on board with making these changes and what your timeframe would be for implementing them?